Optive Fusion UD Lubricating and soothing eye drops. A combination formula for relief, comfort, and protection from dry eye symptoms. In Optive Fusion UD, Sodium Carboxymethylcellulose (CMC) and sodium Hyaluronate (HA) form a bridged matrix to synergistically relieve the symptoms of dry eye. Sodium hyaluronate (HA) is an effective ocular lubricant that helps support tear film stability. Dual Action Lubricating and Osmoprotective Comfort Solution. It is appropriate for use post LASIK surgery for relief of dryness and discomfort following surgery. It is compatible for use with all contact lenses. Preservative-free.